Thermal-efficiency casing for fluid-heating boilers



Jan. 18, 1927. ,614,805

C. A. RYERSON THERMAL EFFICIENCY CASING FOR FLUID HEATING BOILERS FiledJune 15, 1922 INVENTOR: OUR/VELIUS fl. RYERSON 7 a; 51mm). M MGL,,arromvsvs Patented Jan. 18, 1927.

UNITED STATES CORNELIUS ARTHUR RYERSON, OF TORONTO, ONTARIO, CANADA.

THERMAL-EFFICIENCY CASING FOR- FLUID-HEATING BOILERS.

Application. filed Iune.15, 1922. Serial No. 568,527.

My invention relates to. improvements in thermal efficiency casings forfluid heating boilers and the object of the invention is to devise animproved means for directing the hot gases issuing from the furnace downaround the outside of the boiler proper, prior to issuing to the smokepipe.

A further object is to devise means whereby the length of the pathtravelled by the hot gases can be varied prior to passing to thesmokepipe. A further object is to devise means for. preventing an internalexplosion in the casing due to ignition of unburnt gases fracturing thecasing, which occurs at the present time, and another object is todevise auxiliary means for heating water other than by the water jacketof the furnace, which will supplement such water from the water jacketby being connected into the heating system.

Hitherto casings have been constructed with partitions or baflies incontact with and connecting the outer casing with the outside of theboiler, but in carrying out my invention in its simplest form I do awaywith any fiues, merely directing the hot gases from the furnace downaround the-entire outside of the boiler jacket, thus giving anuninterrupted fiow to such gases. Further, in my :0 construction, inassembling the casing I can compensate for differences in draught whichhas not hitherto been possible.

My invention consists of a casing constructed and arranged all ashereinafter more particularly described and illustrated in theaccompanying drawing in which:

Fig. 1 represents an elevational view of a boiler equipped with a casingshowing the casing broken away to expose the construction of theinterior.

Fig. 2 is a horizontal section through the line 22 (Fig. 1), and

Fig. 3 is an enlarged vertical section through the line 33 (Fig. 2).

Like characters of reference indicate corresponding parts in thedifferent views.

1 is the boiler proper which in the resent instance is of cylindricalshape with its longitudinal axis vertical, 2 is a casing of requiredshape extending over the boiler proper, said casing being constructed ofsuitable refractory material, and being suitably spaced from the boilerproper l and provided with orifices in the front thereof to receive theframes of the respective doors of the furnace. -3 is acentral vent inthe top of the casing adapted to be connected by the smoke pipe to thechimney. 4 is a dome or hood applied over the boiler proper andsuitably; spaced from the side and top thereof by means of the angularsupporting members 5, the top of said dome having a'central vent 6registering with the vent 3 in the outer casing 2, said vent 6 beingadapted'to be closed by the slidable damper 7 sliding in guides 8' andoperated by the rod 9.

10 is a hot water outlet from the boiler: 1 which extends through thedomeretwandi the outer casing 2.

The dome 4 is hollow and: adapted to :be: filled with water from thepipe 17, the water when heated being ejected through the pipe 18 whichis connected into-the hot water heating system. The top of the dome 4 isprovided with suitable orifices 11 through; which extend the upperdependingportions 12 of conduits, said conduits havinglower portions 13adapted to telescope into the upper portions 12 and secured thereto; bythe screws 14.

The upper portions 12 of the conduits are provided with conical valves15 which seat in the top thereof and are operable manu ally by means ofthe levers 16, or any other suit-able means. It will be noted thatshould an explosion of unburnt gases occur in the lower part of thecasing these valves will be blown open by the gas expanding and thuspermit such gas to be expelled direct to the. smoke pipe through theorifice 3 thereby obviating the force of the explosion breakin thecasing as might occur if the exploded gas were compelled to follow therestricted upward path between the dome 4 and the outer casing 2.

The operation of my device is as follows:

It will be apparent that as there are no baflles or flues in the casingor dome to interfere with the normal free circulation of the hot gases,such gases after being expelled from the outlet 24 of the boiler properwill be freely circulated in an outward direction over the top of theboiler and downwardly about the outer wall thereof, provided the damper7 and the valves 15 are closed until such gases reach the lower edge ofthe dome 4 when they will pass up through the space between the dome andthe outer casing 2 and be finally ejected through the vent 3 into thesmoke pipe. Should a direct draught be required it is only necessary toopen the damper 7 by means of the rod 9 when such hot gases will beexpelled directly through the vent 6 and vent 3 without being circulatedthrough the casing.

If the valves 15 are open and the lips of the conduits 13 are positionedabove the lower edge of the dome I a portion of the hot gases afterbeing passed down the space between the boiler and the dome 4, will beejected thereoutof through such conduit portions 13 and 12, provided thedamper 7 is closed and the remainder of the gas will pass own about thebottom of the dome and up through the space between such dome and theouter casing 4:. The gas in being ejected from the conduit portions 12will unite with the gas passing up the outside of the dome and will befinally ejected through the vent 3 into the smoke pipe. The operation ofthe valves 15 affords a means of varying the temperature of the hotwater in the boiler without varying the intensity of the fire.

In assembling the casing the portions 13 can be adjusted in lengthrespectively to the portions 12 of the conduits in order to give themost ettlcient results, dependent upon the draught of the chimney, as itis well known that such draughts vary in each individual case.

In casings of the present type internal explosions occasionally occurthrough unburnt gases issuing from the boiler being ignited by a flametherefrom and exploding in the casing, thus causing the fracturingthereof. In my present construction this is obviated by the use of theconicalvalves which permits the ignited unburnt gases in the interior ofthe dome to expand and open the valves. If this means was not providedthe gas would be confined and the explosion would be of suflicient forceto fracturethe casing.

By theuse of the auxiliary water jacket in the dome 4 it will be seenthat I have devised supplemental means for heating water without anyfurther expenditure of fuel which will in fact efl'ect a considerableeconomy.

hat I claim as my invention is:

1. The combination with the boiler proper, of an outer casing extendingabout the boiler in spaced relation thereto, an intermediate domeextending over the boiler and spaced therefrom and from the outercasing, said dome having orifices through the top thereof and dependingextendible conduits mounted in said orifices, and valves for normallyclosing the conduits.

2. The combination with the boiler proper, or an outer casing extendingabout the boiler in spaced relation thereto, an intermediate domeextending over the boiler and spaced theretrom and from the outercasing, said dome having orifices through the top thereot, dependingconduits mounted in said orifices and inverted conical valves normallyseated in said conduits.

CORNELIUS ARTHUR RYERSON.

